E120 crew had altitude overshoot in ZLA class east.

Attributes
ACN	475470
Time
Date	200006
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl bound lower : 12600 msl bound upper : 13000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla.artcc
Operator	common carrier : air taxi
Make Model Name	Brasilia EMB-120 All Series
Operating Under FAR Part	Part 135
Navigation In Use	other vortac
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : multi engine
Experience	flight time last 90 days : 100 flight time total : 1400 flight time type : 150
ASRS Report	475470
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : company policies other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance controller : issued alert none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were flying at cruise altitude when the controller asked us to 'cross 10 mi northwest of lake hughes at and maintain 12000 ft.' as we passed through 13000 ft the controller stated that he had only cleared us to 13000 ft he then advised us to continue our descent to 9000 ft. In the future I will make a greater effort as the PF to monitor all radio communications more closely.

Original NASA ASRS Text

Title: E120 CREW HAD ALT OVERSHOOT IN ZLA CLASS E.

Narrative: WE WERE FLYING AT CRUISE ALT WHEN THE CTLR ASKED US TO 'CROSS 10 MI NW OF LAKE HUGHES AT AND MAINTAIN 12000 FT.' AS WE PASSED THROUGH 13000 FT THE CTLR STATED THAT HE HAD ONLY CLRED US TO 13000 FT HE THEN ADVISED US TO CONTINUE OUR DSCNT TO 9000 FT. IN THE FUTURE I WILL MAKE A GREATER EFFORT AS THE PF TO MONITOR ALL RADIO COMS MORE CLOSELY.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.